I am using the checkboxes in a RadTreeView. The treeview items are bound to my own heirarchical type called TreeNode. When an item is checked how do I determine which TreeNode object was checked?

Currently I am using a command to handle the IsChecked event of the control. I am passing the event arguments to the command. I can get access to all the checked items in the tree as TreeNodes, but am at a loss as to which one was actually last checked.

 <telerik:RadTreeView x:Name="TreePermissions"
                                                 DockPanel.Dock="Top"
                                                 MinHeight="50"
                                                 BorderBrush="Black"
                                                 BorderThickness="1"
                                                 Margin="5,0,5,0"
                                                 IsOptionElementsEnabled="True"
                                                 ItemsSource="{Binding UserPermissions}"
                                                 ItemPrepared="TreePermissions_ItemPrepared">
                                
                                <telerik:EventToCommandBehavior.EventBindings>
                                    <telerik:EventBinding Command="{Binding PermissionCheckedCommand}" EventName="Checked"
                                                          PassEventArgsToCommand="True" />
                                </telerik:EventToCommandBehavior.EventBindings>
                                
                                <telerik:RadTreeView.ItemContainerStyle>
                                    <Style TargetType="{x:Type telerik:RadTreeViewItem}">
                                        <Setter Property="IsExpanded" Value="True"/>
                                        <Setter Property="IsChecked" Value="{Binding IsChecked, UpdateSourceTrigger=PropertyChanged}"/>
                                        <Setter Property="IsEnabled" Value="{Binding IsEnabled, UpdateSourceTrigger=PropertyChanged}"/>
                                    </Style>
                                </telerik:RadTreeView.ItemContainerStyle>
                            </telerik:RadTreeView>

private void OnPermissionChecked(object obj)
        {
            var args = obj as Telerik.Windows.Controls.RadTreeViewCheckEventArgs;
            Telerik.Windows.Controls.RadTreeViewItem item = args.OriginalSource as Telerik.Windows.Controls.RadTreeViewItem;
            // TreeNode node = item as TreeNode; // This does not work, cannot cast/convert for some reason
            Telerik.Windows.Controls.RadTreeView source = args.Source as Telerik.Windows.Controls.RadTreeView;
            if (source != null)
            {
                List<TreeNode> temp = source.CheckedItems.Cast<TreeNode>().ToList();
            }
        }

I have an eventtocommandbehavior  binding as shown below to deal with the EditEnded event of the raddataform which I am using as a row details editor in my gridview. I get the call in my viewmodel from the command with the args, but they are kinda useless.
How to tell what row was being edited?
Also, if the user hits the cancel button how do I prevent the gridview from being updated? I am beginning to wonder what the raddataform buys me. 
My current dataform uses ONLY custom fields. Couldn't I just get rid of the raddataform and use a regular grid with the controls I want as a rowdetailstemplate? If I did that, how could I wire up the OnRowEditEnded event of the gridview to a command associated with a button in my rowdetails editor? For that matter, how to wire it up to the raddataform if I have to use it.
I hope I'm making sense here.

Any help would be great.

Thanks ... Ed

Hello,

i'm using the Telerik Dock Controls.

In order to mvvm i'm using the binding to the Property PanesSource.

I Add a login Screeen at startup and want to show it in the center of the application and not docked to any of my SplitContainers.

The XAML head of the RadPane looks as followed:

Everytime when i add this Control to my Binded Collection this window appears in the left of the docking control.

How can i start this window as floating window in front of my application?

Thanks,

Michael

Hi to all,

I'm trying to use an EditTemplateSelector, but I have problem to retrieve DataContext of RadWindow, my RadWindow has x:Name="radWindow", its relative ViewModel exposes a List<T> collection called StatiCertificato, it seems that it not found it.

When selector use campoEditTesto it works correctly and it works correclty with campoEditData also, when it uses campoEditStato or campoEditDecisione show me correctly RadComboBox but without items. It checked that my collection are full.

Am I using a wrong approach for binding into ItemSource property? If yes, what's wrong?

Hello,

I want to Change Deadline forecolor to Blue of Telerik Gantt view. Now it is in Red color.

Please help me.

Thanks in advance

Hi,

I am using RadAutocompletebox in scrollable size window. Window has vertical scroll and autocompletebox is at center of window. I have typed a text in completebox and suggestion popup appears and my mouse is on textbox area.Now, I have used mouse wheel event. When i use mouse wheel, popup scroll accordingly to up and down.

My concern is that popup should remain at one place but window can scroll accordingly.

Hi,

So when using an application like SQL Server Management Studio I can run a query (let's say select * from customer although my queries are very user driven with a few joins mostly the SQL is generated dynamically) and the results grid will start populating rows extremely quickly until the full set is returned.

I want to emulate this behavior using a RadGridView (WPF)

I have tried using a data set it takes to long and you don't get that initial feedback of seeing the first rows start flooding in.

Next I tried loading the customers from a data reader and putting each row into an ObservableCollection<Customer> it is way faster and allows the objects in .Net to start being populated even before the query has finished but ultimately the UI was unable to keep up with the reader and froze until the full set was populated.

What would be the best approach to get that fast response of data loading and the user seeing the rows start to appear without locking down the UI Thread of the application?

A typical result set is around 100k records and I can put it in the grid in about 5 seconds using a dataset im hoping to get similar time while showing the user immediate feedback their query is getting results